Fed-Ex Shipping cost wrong! Too Low!

[docstill299n]

I just sold an item.  eBay charged Buyer $34 for Fed-Ex Ground shipping, but actual shipping cost to me (Seller) is $42.  Weight and dimensions were entered for listing and have not changed.  Shipping from Florida to California.

1.  Why?

2.  How do I collect the extra $8?

[redlinear]

Scroll all the way to the bottom of the labels page and make sure insurance or signature isn't marked